Somehow, mine got scratched a couple days ago. It was possibly when I dropped it from a height of no more than two feet with a silicone case on it. The screen wasn’t shattered so I didn’t investigate further. But it was after I had it in my pocket for most of the day, bare, with nothing else but a tube of Burt’s Bees chapstick that I noticed the crack. It’s deep enough that my fingernail runs across it, but not so deep that it’s noticeable during operation. It looks like it was damage from the fall, and I feel another fall, even with the case, will crack the screen to the point that it needs to be repaired.
The funny this is, it’s nearly impossible to scratch it with keys and blades when you really try. But my first Focus somehow developed a very shallow, hairline scratch. It hadn’t been dropped, and was kept in my pocket with nothing else.